Here are the possible solutions for star belly and plain belly seuss creatures clue
Answer
Clue
Relevancy
sneetches
Clue
Star-Belly and Plain-Belly Seuss creatures
Seuss's star-bellied creatures
steppe
Clue
Rather plain plain
Plain plain
star
Clue
Plain-Belly Sneetch's lack
coral
Clue
Creatures that can't move but have sex by constantly and simultaneously ejaculating on a full moon once a year. It's called "broadcast spawning" and there are videos and they are glorious